David, probably a good thing they have not laid eggs yet – We have had one hard freeze last week here in mid-Missouri and another freeze forecast for tonight and Monday night. I don’t have much hopes my 5 BB eggs will survive, but if mama stays on the nest incubating them good, maybe . . . .
In regard to your removing the nest – it might be wise to leave it alone unless you really are sure it was made on top of another, but from your pictures, they started from the bottom. Not sure. Maybe they know it is too cold yet, huh? Believe mine got in a hurry.